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You Are On Multi Choice Question Bank SET 1416

70801. The hardness of steel depends upon the





70802. Cartidge brass can be





70803. There are 3 white balls and 2 black balls.If a ball is taken random,what is the probability that it is a black ball?





70804. Blast furnace is used to produce





70805. In flame hardening, oxy-acetylene flame is used.



70806. Which of the following statements are true for annealing of steels?





70807. The ability of a material to undergo large permanent deformation with the application of a tensile force, is called ductility.



70808. Which of the following steel making process is being adopted at Rourkela Steel Plant?





70809. 18-4-1 high speed steel contains





70810. Which of the following statement is true about brittle fracture?





70811. Grey cast iron has





70812. Induction hardening is basically a





70813. When elements like nickel, chromium, copper and molybdenum are added to the molten cast iron, it produces





70814. The strength is the ability of a material to resist





70815. The material widely used for making pendulums of clocks is





70816. The stiffness is the ability of a material to resist





70817. The blade of a power saw is made of





70818. In induction hardening __________ is high.





70819. The metal suitable for bearings subjected to light loads, is





70820. The property of a material essential for spring materials is





70821. A steel with carbon above 0.8% is known as hyper-eutectoid steel.



70822. Which of the following material has nearly zero coefficient of expansion?





70823. In normalising process, the hypo-eutectiod steel is heated from 30° C to 50° C above the upper critical temperature and then cooled in still air.



70824. The alloying element which can replace tungsten in high speed steels is





70825. An aluminium alloy with 11% silicon is used for making engine pistons by die casting technique.



70826. Which of the following is an amorphous material?





70827. The machinability of steel is improved by adding





70828. The carbon in the pig iron varies from





70829. The type of space lattice found in alpha-iron is





70830. The brown smoke during the operation of a bessemer Converter indicates that the





70831. Martensite has needle like structure and is magnetic.



70832. A and B start business in partnership by investing Rs.3,000 and Rs.4,000 respectively.At the end of one year a profit of Rs.1,400 is made.How much amount would A get as his share of profit?





70833. In induction hardening, the depth of hardening is controlled by controlling the voltage.



70834. The austenite is a solid solution of carbon or iron carbide in gamma-iron.



70835. Which of the following display properties similar to that of steel?





70836. Hindalium is an alloy of aluminium and magnesium with a small quantity of chromium.



70837. When a low carbon steel is heated upto upper critical temperature





70838. The steel widely used for motor car crankshafts is





70839. Combined carbon in iron makes the metal





70840. Pearlite consists of





70841. Incoloy, Hastelloy and Vitallium are __________ temperature alloys.



70842. Quenching is not necessary when hardening is done by





70843. The iron ore in the charge of blast furnace acts as an iron bearing mineral.



70844. Beryllium bronze has





70845. The aluminium alloy, mainly used, for anodized utensil manufacture, is





70846. The toughness of a material __________ when it is heated.




70847. The coordination number of a face centred cubic space lattice is





70848. Spheroidal grey cast iron has graphite flakes.



70849. Bronze is an alloy of





70850. Chromium when added to steel __________ the tensile strength.




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